Hi, after some advice if possible. I have just finished laying a 22mm T&G chipboard floor throughout our renovation. Once the kitchen is installed I am going to install Prowarm overlay boards for the underfloor heating, we are going to have LVT on top as a final floor finish. However I have been told by the installer of the flooring that something will need to be between the two. What do people advise? I was thinking 4mm ply sheets. Will these be sturdy enough under the LVT? What do people think? Any advice would be very helpful thanks.
